Hone



Jul 13, 1937. H, I-- B O I 2,086,660

HONE

Filed Sept. 14, 1936 Z6ro55 Z. 156207 I Patented July 13, 1937 UNITED STATES PATENT OFFICE HONE Harold L. Blood, 'Worcester, Mass., assignor to The Heald Machine Company,

Worcester,

Mass, a corporation of Massachusetts Application September 14, 1936, Serial No. 100,580

16 claim;

The present invention relates to a hone especially adapted for the finishing of internal'surfaces, as for example, the outer raceways of roller or ball bearings; and is especially directed to anagainst the surface being honed, although in bers has thus never been provided, and accorda ingly the principal object of the present invention is to provide a resilient mounting foreach individual honing member so that where a plu- 30 rality of stones are used each member will be held against the workpiece with substantially the same pressure regardless of wear on the member and regardless of variations in diameter of the workpiece.

where the surface being honed is tapered the honing members must be arranged to conform to this taper. ,One form of a hone suitable for tapered workpieces is'disclosed in applicant's co pending application Serial No. 69,861, filed March 4o 20, 1936, in which a resilient arrangement is provided for holding the several honing stones all against the workpiece being honed. This resilient arrangement permits an axial reciprocation ofthe workpiece relative to the honing 45 members, since the several members can all move radially of the support on which they are mounted. In the event or rapid wear of one of the honing members in a hone of this character the single resilient mechanism provided will not 50 hold the worn member against the workpiece with the same force that the other less worn members are held. It is a further object 'of the present invention to provide for holding all of the honing members against the workpiece with sub- 55 stantialiy equal pressures independently of variations in the rate of reduction in size oi! the individual members by wear, and independently oi the resilient mechanism provided for expanding the hone. 4

Other and further objects and advantages of 5 the invention will hereinafter more fully appear from the following detailed description taken in connection with the accompanying drawing in which 'Fig. 1 is a side elevation, rtly in section, of

a hone embodying the inven on.

Fig. 2 is an end elevation of the bone of Fi 1. Fig. 3 is an elevation of one of the elements of the hone.

Fig. 4 is a side elevation of the hone head.

Like reference characters refer to like parts in the difierent ,flgures. I

With reference to Fig; 1, the hone comprises'a head or arbor I, see also Fig. 4, having an axial bore 2in which a spindle 3 is slidable. The head has a key 4 engaging with a keyway i in the spindle to hold the latter against rotation. The spindle 3 has an arcuate shoulder 6 positioned within the head, and the end of said spindle projects beyond. the head and has a cap I secured g5 thereto. The oppositev end of the spindle has an axially positioned bolt 8, held against turning by a locking nut 9. A cylindrical hub I 0 on the head providesfor attachment of said head, with the honing members mounted thereon, to the end of a rotatable spindle ll of any suitable character. The spindle 3 is shown as made up of two separate members, but these members are functionally integral and are so described. 1

The head I has a plurality of radially extending slots I2, Figs. 2 and 4, in each of which is positioned a lever I3 substantially of bell-crank form. At the corner of each lever is an arcuate protuberance l4 engageable with the arcuate shoul- I 'der 6 on the hone spindle 3, thus permitting 40 oscillation of the lever about this point.

Surrounding the head I adjacent the base of the slots I2 is an annular member I! secured to the head, as by bolts i6, said annular member having a-fiange ll engaging in a recess II in the head to hold the member in position. Between the member l5 and the head is clamped a resilient disk I! in the form of an annular diaphragm, having resilient fingers 20 extending inwardly of the annular member, with one finger located in 5 lever about the lug. The opposite end of the lever I3 is tapered with the inner surface thereof extending substantially parallel to and spaced from the projecting end of the spindle 3. On the outer surface of the lever at this end is an armate lug 22 which engages in an arcuate recess 23 in a hone carrier 24. On the outer side of each ofthe carriers 24 is located a plate 25 to which is secured, as by a suitable adhesive, a honing member in the form of a stone 26, generally of abrasive material, The stone is additionally held in position by flanges 2'! projecting from the plate, and the plate preferably has lugs 28 engaging in recesses 29 in the carrier.

The plates are held on the carriers by coil springs 30 and 3|, each arranged in the form of an annulus. The spring 30 is positioned at the inner or right hand (Fig. 1) end of the plates and engages the flanges 21. The other coil spring 3| is positioned in a recess 32 in the outer end of each of the plates and the inturned portion of the plate which forms this recess engages in a correspondingly shaped recess 33 in the carrier. Not only do these coil springs hold the plates against the carrier, but they also hold each carrier in engagement with the corresponding lever and hold the levers against the shoulder 6 of the hone spindle 3. For holding the levers l3 in predetermined relation to each other in the head a coil spring 34 is provided, also in the form of an annulus, and this coil spring is positioned in aslot 35 in the head with the spring engaging all of the levers.

'I'hehad above described is applicable to any suitable type of spindle in which is incorporated a structure for expanding and contracting the hone. In the construction shown, the spindle I l, on which the head is mounted, hasan axial bore 36 in which the inner end of the spindle 3 is received. Within the spindle is located an actuating rod 31 having at the end thereofa head 38 engageable with the end of'the bolt 8, and the rod, with the head thereon, is resiliently urged to the left by a'compression coil spring 39 surrounding the rod. The remainder of the spindle is of any-suitable character, one example being fully shown and described in applicants copending application, Serial No. 92,396, filed July 24, 1936, and is not a part of the present invention.

"It is sufiicient to note that the movement of the rod to the left, Fig. 1, is preferably limited to prevent the honing stones from being expanded by the coil spring to such an extent that they cannot desired.

' In operation the hone is expanded to such an amount that it can enter the bore of the workpiece and engage therewith, a workpiece a being shown in operative engagement with the several honing stones. As the workpiece is given an axial reciprocation relative to the hone during the honing operation, the honing stones are urged inwardly as the workpiece moves to the right relative to the hones and outwardly as the workpiece moves to the left, this movement being permitted by the resilient action of the spring 39, and this in and out movement of the stones causes a" slight reciprocatory movement of the rod within the spindle. If any one of the stones becomes worn more than the rest, or if an uneven place is encounteredl in. the work, the pressure exerted by the spring 3'9'cannot compensate for the wear,

but the resiliency of the disk l9 and the fingers 20 cause the lever carrying the worn hone memher to be urged outwardly to a greater extent than the other levers so that all of the stones continue to act upon the workpiece.

From the foregoing it will be apparent that each of the honing stones is resiliently held against the workpiece individually so that variations in the rate of wear of the several stones will not affect the operation of the hone. Where the honing members are normally held resiliently against the workpiece, as by a single resilient mechanism, this individual resilient structure is separate from the other mechanism and operates independently thereof.

I claim,

1. In a honing device, an arbor, a bell-crank lever carried thereby, one end of said lever being engageable with said arbor for rocking'of said lever about said end, a honing member on the opposite end of said lever, means engaging with the corner of the lever for urging the lever and member into operative position, and a resilient connection for said lever at one point of support for resiliently urging said lever into operative position independently of said means.

2. In a honing device, an arbor, a plurality of bell-crank levers carried thereby, one end of each of said levers being engageable withsaid arbor for rocking of said levers about said ends, a honing member on the opposite end of each of said levers, means engageable with the corner of each of said levers for urging each lever and the member carried thereby into operative position, and

a resilient connection between each of said levers and the arbor for resiliently urging each of said levers into operative position independently of said means.

3. In a honing device, a head, levers rockably mounted on said head, a. honing member carried by each of said levers, means engageable with the levers to urge the levers and the members into operative position, and a resilient means acting on each lever independently of said means for resiliently urging each of the members carried by the levers individually into operative position.

4. In a honing device, a head, levers rockably mounted on said head, a honing member carried by each of said levers, resilient means engageable with the levers to urge the levers and the members into operative position, and a resilient means acting on each lever independently of said means for resiliently urging each of the members carried by the levers individually into operative position.

5. In a honing device, a head, a plurality of 1 levers rockably mounted on said head with the connection between said levers and the head resilient, a honing member carried by each of said levers, and means engageable with all of the levers for urging said levers and the members carried thereby into operative position, said resilient connection providing for a resilient urging of each of said levers individually into operative position independently of the first means.

6. In a honing device, a head, a plurality of levers rockably mounted on said head with the connection between said levers and the head resilient, a honing member carried by each of said levers, and resilient means engageable with all of the levers for .urging said levers and the members carried thereby into operative position, said resilient connection providing for a resilient urging of each of said levers individually into operative position independently of the first means.

tit

7. In a honing device, an arbor, a plurality of levers carried thereby and mounted for rocking movement relative thereto, resilient fingers carried by the arbor and engageable by the levers for a resilient support of said levers, a honing member on each lever, and means engaging with all of the levers for urging said levers into operative position.

8. In a honing device, an arbor, a plurality of levers, a resilient connection between said arbor and each of said levers, ahoning member on each lever, andv means engageable with all of said levers for urging said levers as a group into operative position.

9. In a honing machine, an arbor, a plurality of levers, a resilient connection between said arbor and each of said levers, a honing member on each lever, and resilient means engageable with all of said levers for urging said levers as a group into operative position.

10. In a honing device, an arbor having a plurality of radial slots therein, a lever positioned in each of said slots and mounted for pivotal movement relative to the arbor, a resilient'connection between the pivotal support of each lever and the arbor, a honing member rockably mounted' on each lever, and a plunger axially slidable in the arbor and engageable with all of the levers for urging the latter as a group into operative position.

ll. In a honing device, an arbor having a plurality of radial slots therein, a lever positioned in each ofrsaid slots and having a pivotal movement relative to the arbor, a resilient connec- .tion between the pivotal support of each lever and the arbor, a honing member rockably mounted on each lever, and a spring surrounding the arbor and engageable with the honing members for holding said members against the levers.

12. In a honing device, an arbor having a plurality of radial slots at one end thereof, a lever positioned in each of said slots, a ring having a plurality of resilient fingers engageable with one end of each of said levers and providing a pivotal support therefor, a honing member rockably mounted on each of said levers, springs holding said members in position on said levers, and a plunger within the arbor and engaging with each of said levers tor urging the latter .into operative position.

'ior urging the latter into operative position, and

an individual resilient means for each of said members for urging each member separately into operative position, said individual means acting independently of the first means.-

14. In a honing device, a honing head, a plurality of levers carried thereby and rockable relative thereto, a honing member on each of said levers, means engageable with all of said levers for urging the latter outwardly into-operative position, and an individual resilient means tor each or said members for urging each member separately into operative position, said individual meansacting independently of the first means and compensating-tor uneven wear on the individual members.

15. In a honing device, a head, levers rockably mounted on said'he'ad, a honing member carried by each of said levers, means acting upon all of the levers to urge the latter and the members carried thereby simultaneously into operative position, and a resilient means acting on each lever for resiliently urging each of the members carried by the levers individually intooperative position.

16. In a honing device, a plurality of levers, means for supporting said levers, one end of each lever being engageable with said means for rocking movement about said end, a honing member carried by each lever, means acting upon all of the levers simultaneously for urging said levers and the memberscarried thereby into operative position, and a resilient finger forming part of one of said means and engageable with the lever for resiliently urging each of said levers into operative position independently of said first urging means.

" HAROLD L. BLOOD. 

